High efficiency circuit uses the XC9103 and XC6367 series to drive the white LED

Published:2011/6/19 9:37:00 Author:TaoXi | Keyword: High efficiency circuit, white LED | From:SeekIC

TOREX Semiconductor Co., Ltd. Summary: The TOREX Semiconductor Co., Ltd. uses the general step-up DC/DC chip XC9103 series and XC6367 series to form the high efficiency LED driving circuit. Features: This device uses the high efficiency series circuit This device can change the number of the driving LED in the little change condition This device uses only one resistance to control the current of the LED This device has the function of low power consumption standby The driving current is not influenced by the positive voltage fluctuation of the LED This device uses the boost DC/DC converter chip to output the constant current to drive the LED. The value of the LED driving current is equal to the result of the FB terminal voltage divided by and the resistance value which is connected with it. You can change the current which is got through the LED by changing the resistance value. The output voltage of the DC/DC converter is the summation of the LED positive voltage and the FB terminal voltage. The circuit features: The basic circuit:



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